How to Make It
Place beef cubes in a 5½- to 6-quart slow cooker. Top with carrots, mushrooms, and garlic.
Whisk together broth, tomato paste, Worcestershire sauce, thyme, salt, and pepper in a medium bowl. Add broth mixture to slow cooker; stir to combine.
Cover and cook on LOW until beef is tender, 6 to 8 hours. Remove lid, and skim off any fat from surface.
Whisk together water and flour in a small bowl until smooth; slowly stir into beef mixture. Stir in green peas. Increase heat to HIGH.
Top beef mixture evenly with Sweet Potato Mash. Cover and cook on HIGH until gravy has thickened and potatoes are heated through, 20 to 30 minutes.